haxe
typedef OpenFileDialogOptions = {
    @:optional var readContents:Null<Bool>;
    @:optional var readAsBinary:Null<Bool>;
    @:optional var multiple:Null<Bool>;
    @:optional var extensions:Array<FileDialogExtensionInfo>;
    @:optional var title:String;
}

haxe
typedef FileDialogExtensionInfo = {
    @:optional var extension:String;
    @:optional var label:String;
}

haxe
Dialogs.openFile(function(b, files) {
    if (b == DialogButton.OK) {
        trace(files.length);
        trace(files[0].fullPath, files[0].name);
        trace(files[0].text.length);
    }
}, {
    extensions: [
        { extension: "txt", label: "Text Files" },
        { extension: "exe", label: "Executables" },
        { extension: "png,jpeg,gif", label: "Image Files" }
    ],
    readContents: true
});

xml
<?xml version="1.0" encoding="utf-8"?>
<project>
    
    <meta title="EZWorksheet" package="com.spacebubble.ezworksheet" version="1.0.0" company="SpaceBubble" />
    <app main="Main" path="Export" file="EZWorksheet" width="1200" height= "600" fps="" />
    
    <source path="Source" />
    
    <haxelib name="openfl"/>
    <haxelib name="haxeui-core"/>
    <haxelib name="haxeui-openfl"/>
    <haxelib name="texter" version="git"/>
    
    <assets path="Assets" rename="assets"/>
    <icon path="assets/preicon.ico"/>
    
</project>

haxe
Dialogs.openFile(function(b, files) {
    if (b == DialogButton.OK) {
        currentState = new PageEditor([BitmapData.fromBytes(files[0].bytes)]);    
    }
}, {
    extensions: [{extension: "png,jpeg", label: "Image Files"}],
    readContents: true
});